Furniture frame



Feb. 22; 193s. A BERGMANN 2,109,030

FURNITURE FRAME Filed Sept. 12, 1934 Patented Feb. 22, 193s UNITEDSTATES- FURNITURE FRAME Adolf Bergmann, Berlin- Charlottenburg, GermanyApplication September 12, 1934, Serial No. 743,668

In Germanyv September 18, 1933 Claims.

Furniture frames, particularly such as are bent into shape from a singlepiece of steel tubing, require after the bending a finishing treatment,consisting of polishing and plating, which is all 5 the more diflicultowing to the bulky state of the frame.v

The object of the present invention is to obtain furniture frames ofthis type whethermade of steel tubing or other material wherein thefinishing treatment will not present any particular diiiiculty, and theinvention consists in the provision of a frame composed of members eachcomprising a solid or tubular core and a facing for said core having theform of an enclosing,A exible jacket.

l This arrangement has in the first place the advantage that the corecan be made of any suitable cheap material w'lthout regard to theappearance of'the surface thereof, for instance,

rough steel tubing, the necessary finishing treatment, such as nickel orchromium plating being applied to the exible material forming thejacket. The latter may consist of a ilexible pipe or tubing of any wellknown kind and drawn 4over the core. As an alternative, the jacket maybe formed by winding or plaiting thematerial round the core. As afurther alternative the jacket may be formed from long or short sleevesor rings which are threaded on the core. The helical or annular membersforming the jacket may be of different dimensions, the crevices orgrooves between the coarser members being lled in by liner members.

nWhen a iiexible pipe is employed as the jacket,

th'e core may be composed of material which can be injected in plasticcondition into the jacket and which will subsequently set hard withinthe latter. It is also possible to form the core in a separate mold andsubsequently cover it withthe jacket.

With th'e foregoing objects in View, several simple and practicalembodiments of the invention are illustrated by way of example in theaccompanying drawing, in which Fig. 1 represents a perspective-view ofachair made according to the invention;

Figs. 2 to 5 represent part elevations of dillercnt forms of jackets forthe core;

Fig. 6 is a fragmentary, partly sectional view of a frame memberprovided with a molded core;

Fig. 7 is a section on the line Il-II of Fig. 6, and

Fig. 8 is a sectional view illustrating the molding of the core.`

The chair illustrated in Fig. 1 comprises a frame which is bent intoshape from a steel tube c, the latter being subsequently enclosed in ajacket b which is iinished so as to form an appropriate facing for thetube. a is the seat and a' the back of the chair. 5

'I'he jacket may take the form of a flexible metal pipe of any wellknown kind, being nickel or chromium plated or otherwise nished accordeing to requirements. y

As an alternative for this arrangement the jacket may be formed bywinding about the tube c a wire or the like. Fig. 2 shows such a winding.composed of a wire d of semi-circular cross-section.

In Fig. 3 there is shown a'jacket composed of Celluloid or the like, thesurface of which may be provided with any suitable or appropriate designas shown at f.

Fig. 5 shows a sleeve covering-h around` the tube, which pray consist ofa plaited or woven wire or strip.

Instead of being bent from a tube or the. like, the core' may be moldedfrom plastic material adapted to set hard as shown in Figs. 6, 7, and 8,in which case the jacket, if in the form of a continuous-pipe, may serveas the mold, it being for this purpose bent .into the desired shape andmaintained in this shape until the filling has hardened.

In this manner veryl eilective furniture frames can'be produced.

Compositions which contain hydraulic cement or such as adapted to becomerigid by treatment 40 with sulphur, oil or the like, are suitable formold- Y ing the core, India rubber, plastic wood, artificial resin orsimilar substances which are plastic while hot and harden ony beingcooled, can also be used. i f

' Suitable reinforcements in the form of wires may be employed in thecore.

Naturally the core can be made separately and subsequently enclosedinthe jacket. Such a core is illustrated in Figs. 6 to 8. The core isformed in a mold comprising the parts s and r, the upper part beingprovided with a lling' aperture t. The core material n is molded aroundreinforcements q provided with barbs or hooks o as shown in Fig. 7. Ifnot non-hygroscopic, the 55 core is rst covered with a Water repellingsubstance m of rubber or the like, the latter being subsequently facedWith Wire gauze l or the like.

Having now particularly described, and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is:-

1. A bent furniture frame comprising an ornamental outer exible cover,an inner flexible cover, and an initially plastic core within the innercover and adapted when set to hold the frame in substantially rigidcondition, said inner cover forming a mold for the initially plasticmaterial.

2. A bent furniture frame comprising an ornamental outer ilexible cover,an inner flexible cover, an initially plastic core Within the innercover and adapted when set to hold the frame in substantially rigidcondition, and metal reinforcing members Within said core, said innercover forming a mold for the initially plastic material.

3. A furniture frame comprising a thermoplastic core adapted when set tobe in substantially rigid condition, and an ornamental outer metallicflexible cover covering all of the rigid core Wherever the frame isexposed.

4. A furniture frame comprising a thermo-l plastic core adapted when setto be in substantially rigid condition,l an ornamental outer metallicexible cover covering all of the rigid core wherever the frame isexposed, and metal reinforcing members within said cor'e independent ofsaid core.

5. A rod adapted' to be used in the manufacture of a bent furnitureframe consisting of a thermoplastic core adapted when set to be insubstantially rigid condition, and an ornamental outer metallic flexiblecover covering all of the rigid core wherever the frame is exposed, andstrengthening rods within the core.

ADOLF BERGMANN.

